Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. (Check your spelling!) You know the volume in (cm3) of 20 different brains.

Which statements about the two fossil images are correct? 1. cave bears are ancestors of plateosaurus. 2. plateosaurus were present on earth before ostracoderms. 3. ostracoderms were the first to die. 4. plateosaurus died after the ostracoderms. 5. cave bears are the oldest fossils.